How many additional square feet are required to match corporate productivity standards, assuming sales remain unchanged? Which divisions need additional space? How much space does each need?

\begin{tabular}{|l|l|l|l|} \hline Division & Square feet & Sale/Square feet & Standard \\ \hline A & 20,000 & 800 & 500 \\ \hline B & 10,000 & 600 & 450 \\ \hline C & 50,000 & 550 & 600 \\ \hline D & 20,000 & 500 & 550 \\ \hline E & 30,000 & 500 & 450 \\ \hline \end{tabular}